Method of constructing safes



March 1, 1927.v

s. F. I AucKs ET AL IIETHOD OF CONSTRUCTING SAFES Filed Aus.. 8. 1922 y/ 'r i@ f I, MM I. 7

\ Figa ATTORNEY K inof.

Patented Mar. 1, 1927.

UNITED STATES 1,619,139 PATENT OFFICE.

' SAMUEL FORRY LAUCKS AND WILLIAM E. WILKINSON, OF YORK, PENNSYLVANIA,

ASSIGNORS 'IO SAID LAUCKS.

lVIlEl'II-IOD 0F CONSTRUCTING SAFES.

.Application filed August 8, 1922.

ticularly linings of non-burnable metals 1n-v to receptacles, such as safes, vaults, etc.

It is a general object.V of the invention to provide an improved method of casting metals in an expeditious and inexpensive Vmanner resulting in a superior product free from blow-holes or other defects.

Another object is the provision of an improved method for constructing safes, vaults or the like, which includes a novel method of casting linings of nonburnable metal after the formationv of the main body cast- ?)ther Vobjects will'be in part obvious in connection lwiththe following detailed ded scription and in part pointed out' in connection therewith.

The invention accordingly consists in the features 'of construction, 'combinations of elem-ents and arrangement of parts' which will be exempliedin the construction here inafter set forth, and the scope of their application will appear in the appended claims In the accompanying drawings wherein the application of the improved method is illustrated in connection with a safe construction,

Fig.l l is a horizontal section through a safe constructed in accordance with the method of this invention;

Fig. 2 isy an enlarged sectional view through adoor of a safe showing the method of applying a lining of non-burnable metal thereto;

Fig. 3 is a fragmentary -sectional view similar to that of Fig. 1 but showing a modification; and j Fig. 4 shows a modified door construction.

Referring to the drawing for a detailed description of the illustrative methods of practicing this invention and first to Fig. l,Y

a main body casting or basel forming the external walls of a safe is shown;

This body casting is preferably of steel, usually manganese steel but some other metal may be used in its construction. The' body casting l is formed to provide 'walls surrounding an internal compartment, a door 2 opening through the front wall for providing access to the compartment. The interior lining 3 is of a non-burnable material, having a high degree of conductivity, such,

Serial No. 580,404.

for example, as copper, gray iron, etc., or an alloy of such metals. This non-burnable material resists the penetrating action of high temperature iiames such as the oxyacetylene torch, due to its high heat conductJ ing properties dissipating the heat of the flames before the metal can reach the melt ing point. It is the Vplacing of this lining in position in the body casting adjacent the I. walls of the interior compartmentV which forms an important part of this invention.

The body casting having previously been vformed by any approved method, a layer of non-metallic granular material 4, such as molding sand, ordinarily employed in the casting process is placed against the walls of the inner compartment, the inner surfaces thereof being formed to correspond with the adjacent surfaces of th-e lining 3.

' plurality ofcores 5 ofmolding sand of the proper size `and dimensions are inserted through the doorway 2 into the inner ,com partment and are combined and arranged to fill the entire inner space with the excep tion `of a shallow peripheral space correvspending indepth to the thickness of the lining 3 and lying between the cores 5 and the layer 4L. This Ispace is practically coextensive with the inner surface presented by the layer 4 of molding sand but it may extend therebeyond into appropriate recessses formed in the main body casting as indicated at 6 in Fig. l. The inner cores 5 may also be arranged so -as to provide a .space for lining adjacent the inner face of the front wall next to the door opening. In this manner the lining space may be provided to overlie the entire inner surface of the compartment walls. `Waxvents` 7 will be lsuitably positioned in the core or layer 4 and similar vents may be employed in connection with cores 5, communicating with .those of cor-e 4. and leading to doorway 2.

lmade separately and baked separately and inserted into thecasting compartment While the casting is still hot or the cores may be placed in position before the process of heatingthe bodyy casting. andthe complete as-V sembly can then be raised to tliede rede-teinperature. The heating as described results in freeing the. casting and cores from. moisture and other agencies detrimental to the perfect formation of the lining casting. The cores may be provided with openings, (notshown) for pou-ring lining metal. The molten metal for the non-bur-nable lining is then poured while thev assembly is still hot to `completely lill the peripheral space provided for it and the whole. is then allowed to cool otif, the cores 5 being subsequently removed.

The. eniployment4 of` this method produces a lining free from blow-holes or other defects. YIt isclear that the method is as well adapted for placing linings ofnon-burnable or other material in old safes or vaults as for new construction. A burglanproof or fire-proof safe is thus produced having a lining of non-.bnrnable material `placed in positionl to` Cooperate with the. main body casting of the safe in effect providing compound wallstllercfor.

In the modification shown in Fig. 3 the layer or core 4 of molding sand is lomitted and the liningl is cast directly in contact withthe inner faces of the compartment walls. The cores 5 are formedand placed in, position as in the modification previously set forth and the steps .of heatingthe assembled parts and. subsequently pouring the lining While the assembly is still hot are the` same as previously described.

Fig.v 2 sho-ws a safe door construction in which a` non-burnable liningyis cast in position in a cavity inthedoor in accordance4 withthis inyention. The body casting 10 of the door is preferably formedof` manganese steel as in the case of the safe casting. 1 previously described. The body casting of the door is formed vwith an interior cavity or compartment .which may 4be partially iilledwith metallic slabs or plates 1 1 of different thicknesses arranged in layers and designed to occupy any desiredrproportion ofthe inner compartment. Each layer of these plates is constructed in a plurality of sections so as to adapt them for ready insertion through the opening 12 in the inner wall ofthe door. After thesefplates have been inserted'in position to the desired degree, the lining 13 of non-burnable.material is cast in position overlying the metallic plates, following the method outlinedabove in connection with the placing of the lining 3. A core 14 of molding sand may be employed for this purpose and when placed in positionthe entire assembly is heated sub.` stantiallyto acherry red, the lining 13 being poured into the space provided for it While the parts are still het. The core 14 may also be heated before placinf,r in position. lf'desired the door lining 13 may be constructed in hollow form, thateis, in the form ofa layeryotf non-burning'n'ietal covering the inner walls of the door con'ipartment. This isA accomplished by placing molding cores in position within the door cempaxitnient in a mannerY similar tothat disclosed above in connection with placing the lining il in Fig. 1. Y

In Fig. 4 a modified door constriuftion is disclosed lwherein the metallic plates 1l; employed in vllig. 2 are omitted and the casting or lining 1.3 of non-burnable material fillsI the entire space of thc door compartment. rllhe method of heating the body casting aud cores prior to .pouring the lining is the saine as describcdin the methods previously sel forth.

As many changes could'be made in the above construction and majny a )parently wid-ely different embodiments of tliis invention could be made without departing from the scope thereof, it is intended that al; matter contained inthe above `description o1' shown in the accompanying drawings shall be interpreted as illustrative and notv in a limiting sense.

It is `also to. beunderstood that the language used in the following claims is intended to cover all of the generic and specilic features of the inventionherein described and allstaten'ients of the scope of theinvention, which, as a matter of language, mightl be said to fall therebetween.

Havingdescribed our invention what We claim as new; and desire to secure by Letters latent, is :V

1. A method of forming safestructurcs or the like Whichincludes, first foiming (a casting having a cavit i therein, placingy cores of molding sandwitiin said casting so, as to provide' a space betweenthe inner faces of said cores, heating the casting and cores and freeing the same from moisture and other injurious agencies andsubsequently casting an inner lining of non-burnable metal in juxtaposition to a wall of saidcavity While said Castingis still hot whereby to provide a lining of high heat conductivity foi said first-named casting.

2. A method (if-forming safe structures or the like'uwhich includes the initial provision of a castingV formed of a metal haring properties fotlering high resistance to machining operations.applying a material of high heat resist-ant character to certain of the faces of said casting7 said material being so applied as to provide channels extending through its body, filling said channels with material having a relatively low melting point, and subsequently casting a lining of a metal ofhigh heat conductivity over said material.

3. A method of forming a safe structure, which includes utilizing a receptacle body of tool-resistant metal having an opening and a recess in its inner face adjacent such opening, applying cores of heat-insulating, non-metallic material to the inner faces of said body, said cores being extended to a point adjacent said recess, heating the cores and body and thereupon casting'a lining` of heat-dissipating metal to the inner faces of said cores and causing the said lining to eX- tend into said recess.

4. A method of forming a safe structure, Which includes providing a receptacle body formed of tool-resistant metal and being provided with an opening, and a recess in its inner face and spaced from said opening, applying a layer of non-metallic, heatresistant material to the inner faces of said receptacle and to points adjacent the recess formed therein, and pouring a lining of heat-dissipating metal Within said receptacle and upon the inner face of said layer of material, said lining being caused to extend into said recess.

5. A method of forming a safe structure, which includes providing a 'receptacle of tool-resistant metal furnished with an opening and a recess in its inner face adjacent said "opening, and casting a lining of heatdissipating metal Within said receptacle body and extending into said recess.

6. A method of forming a safe structure, which includes providing a receptacle of tool-resistant metal formed with an opening, and pouring into said body a lining of metal having heat-dissipating characteristics, said lining providing a receptacle Within the body of the first and opening in the direction of the first receptacle opening. v

In testimony whereof We atx our signatures.

SAMUEL FORRY LAUCKS. WILLIAM E. WILKINSON. 

